CN102635782A - Emergency L-CNG (liquefied-compressed nature gas) filling skid - Google Patents
Emergency L-CNG (liquefied-compressed nature gas) filling skid Download PDFInfo
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- CN102635782A CN102635782A CN2012101044811A CN201210104481A CN102635782A CN 102635782 A CN102635782 A CN 102635782A CN 2012101044811 A CN2012101044811 A CN 2012101044811A CN 201210104481 A CN201210104481 A CN 201210104481A CN 102635782 A CN102635782 A CN 102635782A
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Abstract
The invention discloses an emergency L-CNG (liquefied-compressed nature gas) filling skid which comprises a skid body, a PLC (programmable logic controller) control system mounted on the skid body, a CNG gas storage bottle group, at least two plunger pumps, at least two air-temperature type gasifiers and a sequential control panel, wherein the plunger pumps, the air-temperature type gasifiers and the sequential control panel are mounted on the skid body, the other end of each plunger pump is connected with each air-temperature type gasifier; one end of the sequential control panel is connected with an outlet ends of the air-temperature type gasifiers, the other end of the sequential control panel is connected with the CNG gas storage bottle group, the CNG gas storage bottle group is respectively connected with multiple CNG gas filling machines; LNG liquid passes the plunger pumps, enters the air-temperature type gasifiers for heat exchange, then enters the sequential control panel and is divided into three paths of CNG gas, and finally is stored provisionally by the CNG gas storage bottle group for filling a CNG car by the CNG gas filling machines. The emergency L-CNG filling skid disclosed by the invention has a high integrated level, can be arranged in a fixed site for gas filling and gas filling in a movable manner, and is convenient to use, and a plurality of emergencies can be can effectively treated in real time.
Description
Technical field
The present invention relates to compressed natural gas (CNG:Compressed Natural Gas) air feed field, relate in particular to a kind of removable emergency liquefaction-compressed natural gas (L-CNG) filling sled.
Background technique
Along with progress of science and technology and economic development, the protection of environment and the comprehensive utilization of the energy more and more receive people's attention, and alternative " clean energy resource " research is all being carried out in countries in the world.Rock gas is owing to combustion cleaning, reserves are huge, ripe as the alternative fuel technology of automobile, and along with the continuous rising of oil price, gas-fueled vehicles receive the favor of global most countries in recent years, and development is swift and violent.
At present the natural gas filling station of China is mainly the CNG gas station, this gas station not only the construction period length, complex process, cost an arm and a leg, reliability and automaticity be low, and also requires to have the gas pipeline at scene, promptly need depend on urban duct.But because the China's natural gas industry is still in the early stage of development, gas line network and gas station construction are all perfect inadequately, so the development of CNG automobile only limits to the main vehicle that goes in the urban district such as bus, taxi and environmental sanitation car at present, and are main with bus.Existing this CNG gas station, not only application area is comparatively narrow, and can only be fixed on certain place and carry out aerating, uses comparatively inconvenience, can't tackle some urgent accidents.
Summary of the invention
The objective of the invention is to, a kind of emergent L-CNG filling sled is provided, its level of integration is higher, can be placed on a fixing place aerating, also can carry out portable aerating, can tackle some urgent accidents timely and effectively, and it is comparatively convenient to use.
For realizing above-mentioned purpose; The present invention provides a kind of emergent L-CNG filling sled; Comprise: prying body, be installed on PLC control system and CNG air cylinder group on the prying body; It also comprises at least two plunger pumps, at least two air-heating type gasifiers, an and sequence control dish, this plunger pump, air-heating type gasifier, and the sequence control dish all be installed on the prying body; This each plunger pump one end is connected with a liquid inlet pipe and muffler respectively, and this liquid inlet pipe is connected with a LNG storage tank respectively with muffler, and each plunger pump the other end all is connected with air-heating type gasifier; Said sequence control dish one end is connected with the outlet end of air-heating type gasifier, and the other end is connected with CNG air cylinder group, and this CNG air cylinder group also is connected with several CNG filling machines respectively; LNG liquid in the said LNG storage tank, gets into the sequence control dish again and is divided into three road CNG gases through air-heating type gasifier heat exchange exchange through behind the plunger pump, carries out buffer memory through CNG air cylinder group, annotates for the CNG automobile for the CNG filling machine.
Among the present invention, the liquid inlet pipe of said plunger pump also is connected with an ORCA car respectively with muffler; Said LNG storage tank is transported by a LNG tank car, unloads after the supercharging vaporizer is pressurized to 0.45MPa-0.85MPa through one, utilizes pressure reduction that LNG liquid is fed through in the LNG storage tank, and this LNG storage tank also is provided with a storage tank supercharging vaporizer.
Wherein, be equipped with a liquid flowing valve on the liquid inlet pipe of said each plunger pump, be equipped with fluid valve on the muffler one time, the outlet end of each plunger pump is equipped with a fluid valve; Under the normal standby state, the liquid flowing valve of plunger pump, return fluid valve, and the fluid valve all be in closed condition.
The outlet end of LNG storage tank is provided with an outlet Emergeny Cutoff Valves, is provided with an atmospheric valve between plunger pump and the air-heating type gasifier; The liquid inlet pipe of plunger pump and muffler, and the outlet end of air-heating type gasifier be equipped with temperature transducer, CNG air cylinder group is provided with a pressure transducer.
Among the present invention, when the outlet temperature of air-heating type gasifier was lower than 10 ℃ of ambient temperatures, the outlet Emergeny Cutoff Valves of PLC control system control LNG storage tank outlet end cut out automatically.
Special, a plunger pump among the present invention is subsequent use to do, and when other plunger pump breaks down, switches to this subsequent use plunger pump through the PLC control system and works on; One of them air-heating type gasifier is subsequent use to do; This subsequent use air-heating type gasifier is in free defrost state; When the temperature sensor monitors temperature of air-heating type gasifier outlet end is lower than 10 ℃ of ambient temperatures, switches to this subsequent use air-heating type gasifier through the PLC control system and work on.
The LNG storage tank adopts low pressure, and-120 ℃～162 ℃ the low-temperature storage LNG liquid of 0.4Mpa-0.8Mpa; The pressure of this LNG storage tank is through mechanical type boost pressure regulation valve and the control of reduction regulation valve; When the LNG pressure of storage tank is lower than the setting pressure of boost pressure regulation valve; The boost pressure regulation valve is opened, and when pressure rose to the setting pressure of boost pressure regulation valve, the boost pressure regulation valve cut out automatically; When the LNG pressure of storage tank was higher than the setting pressure of reduction regulation valve, the reduction regulation valve was opened, and when pressure was reduced to the setting pressure of reduction regulation valve, the reduction regulation valve cut out automatically.
In addition; Between the outlet end of air-heating type gasifier and sequence control dish, can also be connected with a water-bath type heater; When temperature is lower than-15 ℃, through the real-time monitor temperature of temperature transducer, when temperature is lower than the judgment value that presets; Automatically switch to the water-bath type heater through the PLC control system, the CNG gas of air-heating type gasifier output is delivered to the sequence control dish again after the water-bath type heater heats heats up.
Sequence control dish of the present invention can be divided into CNG gas high pressure 24Mpa-25Mpa, middle pressure 22Mpa-23Mpa, reach low pressure 20Mpa-21Mpa three tunnel, carries out buffer memory through CNG air cylinder group.
Moreover the present invention also comprises a press mold machine, and BOG heater, and this press mold machine is used to reclaim the BOG that the LNG storage tank produces, and BOG gets into CNG air cylinder group stored for future use after in the press mold machine, being compressed to 25Mpa after the re-heat of BOG heater.
The emergent L-CNG filling of the present invention sled; It utilizes LNG liquid directly to convert the CNG pressurized gas into; And through the PLC control system automatically control carry out filling in emergency circumstances for the CNG automobile, its level of integration is higher, the design cycle is short, technology is simple, cheap, reliability and automaticity are higher, need not to depend on urban duct; Both can be placed on a fixing place aerating; Also can portable as required aerating, can tackle some urgent accidents timely and effectively, it is more convenient to use.
Description of drawings
Fig. 1 is the modular structure schematic representation of a kind of specific embodiment of the present invention's emergent L-CNG filling sled.
Embodiment
As shown in Figure 1; The present invention provides a kind of emergent L-CNG filling sled; Comprise: prying body, be installed on PLC control system (not shown) and CNG air cylinder group 10 on the prying body; It also comprises at least two plunger pumps 20, at least two air-heating type gasifiers 30, an and sequence control dish 40, this plunger pump 20, air-heating type gasifier 30, and sequence control dish 40 all be installed on the prying body; These each plunger pump 20 1 ends are connected with a liquid inlet pipe 22 and muffler 24 respectively, and this liquid inlet pipe 22 is connected with a LNG storage tank 50 respectively with muffler 24, and each plunger pump 20 the other end all is connected with air-heating type gasifier 30; Said sequence control dish 40 1 ends are connected with the outlet end of air-heating type gasifier 30, and the other end is connected with CNG air cylinder group 10, and this CNG air cylinder group 10 also is connected with several CNG filling machines 12 respectively; LNG liquid in the said LNG storage tank 50 is through behind the plunger pump 20; Through air-heating type gasifier 30 heat exchange exchange; Get into sequence control dish 40 again and be divided into three road CNG gases, carry out buffer memory, annotate for the CNG automobile for CNG filling machine 12 through CNG air cylinder group 10.
Emergent L-CNG filling sled of the present invention is highly integrated, and all equipment is installed on the prying body, and it can be fixed through pipeline and connect LNG storage tank 50, by LNG storage tank 50 LNG is provided liquid.Among the present invention, the liquid inlet pipe 22 of said plunger pump 20 also is connected with a portable LNG trailer (ORCA) 60 respectively with muffler 24, and it can connect ORCA car 60 through flexible pipe is on-the-spot according to actual needs, thereby carries out portable aerating.
In the present invention, the outlet end of said LNG storage tank 50 is provided with an outlet Emergeny Cutoff Valves (not shown), is provided with an atmospheric valve 32 between plunger pump 20 and the air-heating type gasifier 30; The liquid inlet pipe 22 of plunger pump 20 and muffler 24, and the outlet end of air-heating type gasifier 30 be equipped with temperature transducer 34, CNG air cylinder group 10 is provided with a pressure transducer 14.The temperature transducer 34 that these plunger pump 20 liquid inlet pipes 22 and muffler 24 places are provided with; Showing temperature on the spot; And this temperature is uploaded to the PLC control system participates in program control; In plunger pump 30 precooling process, detect muffler 24 through the PLC control system and judge with the temperature difference of liquid inlet pipe 22 whether precooling is abundant.Wherein this temperature difference can artificially be provided with according to different gas stations.
As a kind of specific embodiment of the present invention; Can adopt two plunger pumps 20 through the subsequent use selection control mode of double pump; One of them plunger pump 20 is subsequent use to do, and when other plunger pump 20 breaks down, switches to this subsequent use plunger pump 20 through the PLC control system and works on.Same, in this embodiment, can adopt two air-heating type gasifiers 30, one of them air-heating type gasifier 30 is subsequent use to do.Guarantee 30 work of an air-heating type gasifier generally speaking; Subsequent use air-heating type gasifier 30 is in free defrost state; When temperature transducer 34 monitor temperatures of air-heating type gasifier 30 outlet end are lower than 10 ℃ of ambient temperatures; Can be uploaded to the PLC control system and point out, send control signal, work on thereby switch to this subsequent use air-heating type gasifier 30 through the PLC control system.Perhaps, when under the extremely low working environment of northern winter temperature, can also adopt two modes that air-heating type gasifier 30 is worked simultaneously according to the selection of PLC control system.
As a kind of selectivity embodiment of the present invention; Said PLC control system can adopt Automatic Control; It is by a PLC centralized control, and this PLC control system specifically comprises instrument cabinet, actuating cable, Emergeny Cutoff Valves, instrument supply gas system, and field instrument etc. (not shown).Wherein instrument cabinet can show outlet end temperature, supply gas pressure of pressure, liquid level, the air-heating type gasifier 30 of LNG storage tank 50 etc.When the pressure liquid level of LNG storage tank 50 was too high or too low, the PLC control system can be sent alarm signal.When the outlet temperature of air-heating type gasifier 30 is lower than 10 ℃ of ambient temperatures; The PLC control system will be controlled the outlet Emergeny Cutoff Valves of LNG storage tank 50 outlet end and close automatically; In case of emergency also can be through manual-lock outlet Emergeny Cutoff Valves, so that other line equipment is played a protective role.
Further, be equipped with a liquid flowing valve 222 on the liquid inlet pipe 22 of each plunger pump 20 of the present invention, be equipped with fluid valve 242 on the muffler 24 one time, the outlet end of each plunger pump 20 is equipped with a fluid valve 202.Under the normal standby state, the liquid flowing valve 222 of plunger pump, return fluid valve 242, and fluid valve 202 all be in closed condition.Under pressurized state, the liquid flowing valve 222 of opening a plunger pump 20 wherein with return fluid valve 242, motor is not worked, and lets plunger pump 20 precoolings.After precooling was accomplished, the fluid valve 202 of opening plunger pump 20 was closed back fluid valve 242, and starting electrical machinery gets into working state.LNG liquid after the supercharging gets into corresponding air-heating type gasifier 30, after gasification, gets into CNG air cylinder group 10 through sequence control dish 40.When the outlet end temperature of air-heating type gasifier 30 is lower than set temperature value; Need to open the re-heat heating; When still being lower than set temperature value, then need carry out motor frequency conversion control, make the outlet end temperature of air-heating type gasifier 30 be higher than set temperature value all the time like its outlet end temperature.When the pressure signal that receives LNG storage tank 50 when the PLC control system reaches setting value (being made as 25Mpa usually); Motor quits work, and closes the liquid flowing valve 222 of plunger pump 20, opens atmospheric valve 32 to reduce outlet pressure; Close atmospheric valve 32 then, get into holding state.
In the specific embodiment of the invention; Said LNG storage tank 50 adopts low pressure, and-120 ℃～162 ℃ the low-temperature storage LNG liquid of 0.4Mpa-0.8Mpa; CNG after the compression gasification is divided into three road CNG gases through sequence control dish 40; Get into CNG air cylinder group 10, again by 12 pairs of CNG refuelings of CNG filling machine.As a kind of preferred embodiment of the present invention; Should in the emergent L-CNG filling sled press mold machine can be set also, reach boil-off gas (BOG:Boil OffGas) heater (not shown); This press mold machine is used to reclaim the BOG that LNG storage tank 50 produces, and BOG gets into CNG air cylinder group 10 stored for future use after in the press mold machine, being compressed to 25Mpa after the re-heat of BOG heater; Can farthest utilize unstrpped gas, cut the waste.In the present invention, sequence control dish 40 can be divided into CNG gas high pressure 24Mpa-25Mpa, middle pressure 22Mpa-23Mpa, reach low pressure 20Mpa-21Mpa three tunnel, and then carries out buffer memory through CNG air cylinder group 10.
Moreover, consider Effect of Environmental, can also between the outlet end of air-heating type gasifier 30 and sequence control dish 40, be connected a water-bath type heater 36 is set.Under some special environment; When temperature (generally being lower than-15 ℃) on the low side; Through temperature transducer 34 real-time monitor temperatures; When temperature is lower than judgment value that presets, can automatically switch to water-bath type heater 36 through the PLC control system, the CNG gas of air-heating type gasifier 30 outputs is delivered to sequence control dish 40 again behind water-bath type heater 36 heat temperature raisings.This temperature control mode has improved the adaptive capacity of emergent L-CNG filling sled of the present invention under varying environment greatly, uses more safe and reliable.
Emergent L-CNG filling sled of the present invention specifically comprises the flow process of unloading, gasification flow process, aerating flow process, reaches storage tank pressure regulation flow process in use.In the flow process of unloading; LNG storage tank 50 is by a LNG tank car 70 transportations; Unload after supercharging vaporizer 72 is pressurized to 0.45MPa-0.85MPa through one at unloading deck, utilize pressure reduction that LNG liquid is fed through in the LNG storage tank 50, this LNG storage tank 50 also is provided with a storage tank supercharging vaporizer 52.In the gasification flow process; When plunger pump 20 starts; LNG liquid in the LNG storage tank 50 is drawn out of and is pressurized to the above pressure entering air-heating type gasifier 30 of 25Mpa; LNG liquid through with the air heat exchange, in air-heating type gasifier 30, become gas and get into CNG air cylinder groups 10 through sequence control dish 40 back.In the aerating flow process, after CNG filling machine 10 and the vehicle of treating aerating connected, the valve (not shown) of opening CNG air cylinder group 10 up to 20Mpa, then stopped aerating to the CNG refueling automatically.In storage tank pressure regulation flow process; The pressure of LNG storage tank 50 can be through mechanical type boost pressure regulation valve and reduction regulation valve (not shown) control, and when LNG storage tank 50 pressure were lower than the setting pressure of boost pressure regulation valve, the boost pressure regulation valve was opened; After being gasified by air-heating type gasifier 30, partial L NG returns the gas-phase space of LNG storage tank 50; Thereby the pressure in the LNG storage tank 50 is risen, and when pressure rose to the setting pressure of boost pressure regulation valve, the boost pressure regulation valve cut out automatically.When LNG storage tank 50 pressure were higher than the setting pressure of reduction regulation valve, the reduction regulation valve was opened, and the gas phase in the LNG storage tank 50 is used by preferential, and when pressure was reduced to the setting pressure of reduction regulation valve, the reduction regulation valve cut out automatically.
In sum; Emergent L-CNG filling sled of the present invention, it utilizes LNG liquid directly to convert the CNG pressurized gas into, and carries out filling in emergency circumstances for the CNG automobile through the automatic control of PLC control system; Its level of integration is higher, the design cycle is short, technology is simple, cheap, reliability and automaticity are higher; Need not to depend on urban duct, both can be placed on a fixing place aerating, also can portable as required aerating; Can tackle some urgent accidents timely and effectively, it is more convenient to use.
The above; For the person of ordinary skill of the art; Can make other various corresponding changes and distortion according to technological scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.
Claims (10)
1. an emergent L-CNG filling is prized; Comprise prying body, be installed on PLC control system and CNG air cylinder group on the prying body; It is characterized in that; Also comprise at least two plunger pumps, at least two air-heating type gasifiers, an and sequence control dish, this plunger pump, air-heating type gasifier, and the sequence control dish all be installed on the prying body; This each plunger pump one end is connected with a liquid inlet pipe and muffler respectively, and this liquid inlet pipe is connected with a LNG storage tank respectively with muffler, and each plunger pump the other end all is connected with air-heating type gasifier; Said sequence control dish one end is connected with the outlet end of air-heating type gasifier, and the other end is connected with CNG air cylinder group, and this CNG air cylinder group also is connected with several CNG filling machines respectively; LNG liquid in the said LNG storage tank, gets into the sequence control dish again and is divided into three road CNG gases through air-heating type gasifier heat exchange exchange through behind the plunger pump, carries out buffer memory through CNG air cylinder group, annotates for the CNG automobile for the CNG filling machine.
2. emergent L-CNG filling sled as claimed in claim 1, it is characterized in that: the liquid inlet pipe of said plunger pump also is connected with an ORCA car respectively with muffler; Said LNG storage tank is transported by a LNG tank car, unloads after the supercharging vaporizer is pressurized to 0.45MPa-0.85MPa through one, utilizes pressure reduction that LNG liquid is fed through in the LNG storage tank, and this LNG storage tank also is provided with a storage tank supercharging vaporizer.
3. emergent L-CNG filling sled as claimed in claim 1, it is characterized in that: be equipped with a liquid flowing valve on the liquid inlet pipe of said each plunger pump, be equipped with fluid valve on the muffler one time, the outlet end of each plunger pump is equipped with a fluid valve; Under the normal standby state, the liquid flowing valve of plunger pump, return fluid valve, and the fluid valve all be in closed condition.
4. emergent L-CNG filling sled as claimed in claim 1, it is characterized in that: the outlet end of said LNG storage tank is provided with an outlet Emergeny Cutoff Valves, is provided with an atmospheric valve between plunger pump and the air-heating type gasifier; The liquid inlet pipe of plunger pump and muffler, and the outlet end of air-heating type gasifier be equipped with temperature transducer, CNG air cylinder group is provided with a pressure transducer.
5. emergent L-CNG filling sled as claimed in claim 4 is characterized in that: when the outlet temperature of air-heating type gasifier was lower than 10 ℃ of ambient temperatures, the outlet Emergeny Cutoff Valves of PLC control system control LNG storage tank outlet end cut out automatically.
6. emergent L-CNG filling sled as claimed in claim 4, it is characterized in that: one of them plunger pump is subsequent use to do, and when other plunger pump breaks down, switches to this subsequent use plunger pump through the PLC control system and works on; One of them air-heating type gasifier is subsequent use to do; This subsequent use air-heating type gasifier is in free defrost state; When the temperature sensor monitors temperature of air-heating type gasifier outlet end is lower than 10 ℃ of ambient temperatures, switches to this subsequent use air-heating type gasifier through the PLC control system and work on.
7. emergent L-CNG filling sled as claimed in claim 1 is characterized in that: said LNG storage tank adopts low pressure, and-120 ℃～162 ℃ the low-temperature storage LNG liquid of 0.4Mpa-0.8Mpa; The pressure of this LNG storage tank is through mechanical type boost pressure regulation valve and the control of reduction regulation valve; When the LNG pressure of storage tank is lower than the setting pressure of boost pressure regulation valve; The boost pressure regulation valve is opened, and when pressure rose to the setting pressure of boost pressure regulation valve, the boost pressure regulation valve cut out automatically; When the LNG pressure of storage tank was higher than the setting pressure of reduction regulation valve, the reduction regulation valve was opened, and when pressure was reduced to the setting pressure of reduction regulation valve, the reduction regulation valve cut out automatically.
8. emergent L-CNG filling sled as claimed in claim 1; It is characterized in that: also be connected with a water-bath type heater between the outlet end of said air-heating type gasifier and the sequence control dish; When temperature is lower than-15 ℃, through the real-time monitor temperature of temperature transducer, when temperature is lower than the judgment value that presets; Automatically switch to the water-bath type heater through the PLC control system, the CNG gas of air-heating type gasifier output is delivered to the sequence control dish again after the water-bath type heater heats heats up.
9. like claim 1 or 8 described emergent L-CNG filling sleds, it is characterized in that: said sequence control dish is divided into CNG gas high pressure 24Mpa-25Mpa, middle pressure 22Mpa-23Mpa, reaches low pressure 20Mpa-21Mpa three tunnel, carries out buffer memory through CNG air cylinder group.
10. emergent L-CNG filling sled as claimed in claim 1; It is characterized in that: also comprise a press mold machine, reach the BOG heater; This press mold machine is used to reclaim the BOG that the LNG storage tank produces, and BOG gets into CNG air cylinder group stored for future use after in the press mold machine, being compressed to 25Mpa after the re-heat of BOG heater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210104481.1A CN102635782B (en) | 2012-04-11 | 2012-04-11 | Emergency L-CNG (liquefied-compressed nature gas) filling skid |
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| CN201210104481.1A CN102635782B (en) | 2012-04-11 | 2012-04-11 | Emergency L-CNG (liquefied-compressed nature gas) filling skid |
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| CN102635782B CN102635782B (en) | 2015-01-28 |
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| CN103411128A (en) * | 2013-03-21 | 2013-11-27 | 宁波明欣化工机械有限责任公司 | Integrated storage tank supercharge and gasification sledge |
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| CN107388033B (en) * | 2017-07-11 | 2019-05-24 | 上海新奥新能源技术有限公司 | A kind of liquefied natural gas supplying system and its application method |
| CN107544422A (en) * | 2017-10-20 | 2018-01-05 | 成都华气厚普机电设备股份有限公司 | A kind of civilian gasification sledge automatic control system of LNG Dewar bottles and control method |
| CN110081305A (en) * | 2019-05-05 | 2019-08-02 | 安瑞科(廊坊)能源装备集成有限公司 | LNG air feed equipment |
| CN114923126A (en) * | 2022-04-29 | 2022-08-19 | 烟台杰瑞石油装备技术有限公司 | Natural gas control system and control method thereof |
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